Amphibromus from the Greek 'amphi' meaning about and 'bromus' a grass genus; near the genus Bromus. Macrorhinus from the Greek 'makros' meaning large and 'rhis' meaning nose; referring to the drawn out apex of the lemma.

Distribution:

Found in permanent or temporarily damp areas on clay, sand or sandy loams on Eyre Peninsula, Mount Lofty Ranges and the lower Southeast. Also found in Western Australia, New South wales, Victoria and Tasmania.

Status:

Native. Rare in South Australia. Rare in Western Australia and Tasmania. Common in other states.

Lemma very roughly papillose, the papillae concentrated on the lower half, less dense and concentrated along the nerves towards the apex, 5.3-7.9 mm long, apex 4-toothed, the inner teeth 0.5-1.15 mm long, the outer teeth shorter, the nerves usually stopping short of the tooth apex; awn arising 50-60% of the lemma length from the tip, bent, slightly to moderately twisted, scabrous, 10-19 mm long, pale-green to a darker brown.

Seed type:

Yellow-brown grain to 2 mm long.

Embryo type:

Lateral.

Seed collecting:

Use hands to gently strip seeds off the mature seed spike that are turning straw colour. Mature seeds will come off easily. Alternatively, you can break off the whole seed spike.

Seed cleaning:

Place the seeds/spike in a tray and leave to dry for two weeks. No further cleaning is required if only seed collected. If seed spikes collected, use hand to strip off the mature seeds. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.

Seed viability:

From one collection, the seed viability was high, at 75%.

Seeds stored:

Location

No. of seeds(weight grams)

Numberof plants

Datecollected

Collection numberCollection location

Datestored

% Viability

Storagetemperature

BGA

3400 (5.42 g)

100+

11-Nov-2009

DJD1783South Eastern

Jun-2010

75%

-18°C

Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.Number of plants: This is the number of plants from which the seeds were collected.Collection location: The Herbarium of South Australia's region name.% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.